I can definitely see your point. Celebrities are the center of attention and can influence people. But the two you mentioned, well three actually, are entertainers first and foremost. They had a skillset that was interesting to watch and people would pay to do so. So it gets back to the definition of “influencer”… it’s always the nuance of definition isn’t it 😀
So I guess my definition would include some no talent YouTube or Instagram C-rated “celebrity” that is essentially famous for being famous. They expect special treatment and recognition when it isn’t deserved or warranted. They are often pretentious and obnoxious. When I think of “influencer” this is the image in my mind.